Answer:
a. It can be used for photosynthesis.
Explanation:
Since carbon dioxide is needed in the photosynthesis process, then much of the carbon dioxide which is produced by green plants is not always excreted in form of metabolic waste because it can be easily used in the photosynthesis process.
Someone tat stands up for something
They help control body temperature
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You're aorta pumps blood from your left ventricle into your body.
If there is an option for Vitamin B12 then that will be your answer.
